<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    async function getData() {
      console.log('开始获取数据A......')
      await new Promise((resolve, reject) => {
        setTimeout(() => {
          console.log('获取数据A成功')
          resolve()
        }, 2000)
      })
      console.log('end');
    }
    getData()
  </script>
</body>

</html>